[pypy-dev] Bytecode counting patch

[Ben.Young at risk.sungard.com]

Hi PyPys! 

Here's a patch that counts the number of times the different bytecodes are 
used. I haven't tried doing translation yet as I can't use the work 
machine cycles, but it can't be far off. I've put the counts on the object 
space as this is accessable from most places.

I've also implemented something that should resort the opcodes in the 
switch statement of the bytecode dispatcher according to the statistics I 
found. This may have a slight speed improvement.



Cheers,
Ben
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